Rate My Professor Johan Nilsson

Professor Johan Nilsson holds the position of Professor of Optoelectronics at the University of Southampton's Optoelectronics Research Centre, where he leads the High Power Fibre Lasers research group. He earned his M.S. degree in engineering physics from Chalmers University of Technology, Gothenburg, Sweden, in 1989, and his Doctorate in Engineering Physics in 1994. His research specializations encompass optoelectronics, high-power fibre lasers and amplifiers, nonlinear optics, fibre optics, and related photonics technologies. The group's work targets advanced fibre lasers for applications including beam combination, lidar, sensing for net-zero aviation such as pollution monitoring, materials processing, and aerospace. Efforts focus on achieving higher powers, extending wavelengths from ultraviolet to mid-infrared, and developing novel fibre designs for pulsed and continuous-wave operations using cladding-pumping, fibre Raman devices, and crystals for wavelength conversion.

Nilsson's career spans industry and academia, advancing guided-wave lasers and amplifiers in system, fabrication, and materials aspects. Pioneering contributions include the first fibre laser with over 1 kW output power in a nearly diffraction-limited beam, the first cladding-pumped fibre Raman laser, and multiple record-breaking demonstrations in single-frequency sources, pulsed sources, and beam combination. He was elected a Fellow of Optica in 2010 for seminal contributions to the development and demonstration of high-power fiber lasers. Select key publications feature 'High-Power Fiber Lasers' in Science (2011), '656 W Er-doped, Yb-free large-core fiber laser' in Optics Letters (2018), '100 W CW Cladding pumped Raman fiber laser at 1120 nm' (2010), and recent papers such as 'Quenching dynamics in highly doped erbium fiber core-pumping, amplifier configuration' in AIP Advances (2025) and 'Explicit analytic efficiency equation for saturated counter-pumped fiber amplifiers: application to cladding-pumped erbium-doped fiber amplifiers' in Optics Communications (2025). His scholarship garners over 18,000 citations on Google Scholar, underscoring profound impact on high-power photonics.